Sounds like you haven't been ticketed yet, quite normal if you did this on the telephone, but abnormal if you booked online.

It may be the points won't be removed until the back office gest to your flight, their work is daily re-prioritised by departure date, so it may not happen until very close to departure. Again not unusual. Just check that you are ticketed about 2 days before departure via classic.checkmytrip.com - there should be a ticket number starting 125- in there at some point.